The Republican effort to repeal Obamacare is once again on life support, just one more "no" vote away from having their latest effort to overhaul the Affordable Care Act scuttled.

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The next 24 hours are critical for the future of Graham-Cassidy, the latest Republican plan to overhaul Obamacare from South Carolina Sen. Lindsey Graham and Louisiana Sen. Bill Cassidy.

On Monday, the Senate's finance committee held a hearing on their bill that was repeatedly interrupted by protesters, and Republicans will have to make a decision soon about whether or not the bill will come to the Senate floor for a vote even though the latest version of the bill wasn't unveiled until Sunday.

So far, two Republicans -- Sens. John McCain of Arizona and Rand Paul of Kentucky -- have publicly come out against the latest bill to overhaul Obamacare. That number could grow as soon as Monday when Maine Republican Sen. Susan Collins -- who said on CNN Sunday that she couldn't envision a scenario in which she would support the bill -- expects a partial score from the non-partisan Congressional Budget Office. Leaders are also closely watching Alaska Sen. Lisa Murkowski, who has been mulling over her decision at home over the weekend.

Sen. Rand Paul spoke on Monday saying that he still wasn’t supporting the new bill. He said his intention is to work with the Democrats on something and to completely repeal and replace Obamacare.

During the press conference, Paul said he spoke with the president about his decision and said that the president was not cross with him.

Before his press conference, Paul spoke with CNN's Jake Tapper. Tapper asked him if he believed they were getting any closer on the health care bill vote.